Jun 11, 2026 / By Anas Heaba / in Growing Guides
The Four O'Clock Flower, also called Marvel of Peru (Mirabilis jalapa), is a tender herbaceous perennial that earns its Arabic name "شب الليل" honestly: its tubular, trumpet-shaped flowers open in the afternoon and early evening, stay fragrant through the night to attract evening pollinators, then fade by the next morning. A single bushy plant can carry blooms in white, red, yellow, pink, purple or eye-catching variegated mixes. For Egyptian gardens it is almost ideal: it loves warmth, shrugs off our hot summers, and forms a tuberous root that usually survives mild Egyptian winters in the ground, so it returns year after year.
This plant is frost-tender and heat-loving, so the safe window is late winter to spring, once nights are no longer near freezing. In the Nile Delta, where light winter frost can appear in December and January, wait until February or March. In frost-free Upper Egypt you can start a few weeks earlier, in late January to February. Spring sowing lets plants establish before the hottest months and gives a long bloom from summer through autumn. Avoid sowing into the peak heat of high summer.
Sow seed directly outdoors after all danger of frost has passed, or start it indoors up to about 8 weeks earlier (treat it the same way you treat tomatoes). Plant seeds about 0.6 cm deep. The seed coat is hard, so soaking the seed in water overnight, or carefully nicking the coat, speeds up germination. At around 20-21 C seeds usually sprout in 5-7 days; for early-spring indoor sowing, an optimal range of 13-18 C also works well. Thin seedlings or set transplants about 30-60 cm apart, because mature plants reach roughly 45-100 cm tall and 30-60 cm wide and need room to spread. Choose a full-sun, ideally south-facing spot with 6 or more hours of direct sun; partial shade is tolerated but plants grow leggy with fewer flowers.
Four O'Clocks are not greedy, but a little feeding rewards you with more blooms. Feed monthly during the growing season with a high-potash liquid fertiliser, such as a tomato feed, to encourage flowering. In genuinely rich soil you can feed less often; the general rule is simply to fertilise periodically for the best growth.
Keep the soil evenly moist but well-drained, giving moderate, regular water through the growing season. For plants in pots, avoid over-watering, since soggy soil can rot the roots and tubers. The plant is otherwise easy: it is generally trouble-free and disease-free with few pests. Aphids can appear, especially on plants grown indoors or under cover, and slugs are an occasional nuisance; inspect leaf undersides and remove aphids by hand early, which is usually enough. One caution: Four O'Clocks self-seed readily and can spread vigorously, so deadhead or clear fallen seed if you don't want volunteers. All parts, especially the seeds and roots, are harmful if eaten, so keep them away from children and pets.
This is a flower grown for show and fragrance rather than a food crop, so the "harvest" is the bloom itself. Expect flowers from summer through autumn, opening late in the day and wilting by the following morning. In autumn, before the first frost, you can lift the tuberous roots and store them in dry, cool, frost-free conditions, then replant in spring after the last frost. In most of Egypt the tuber simply stays in the ground over the mild winter and resprouts on its own; lifting and storing is mainly useful in colder Delta micro-sites.
To get started, pick up a packet of quality Four O'Clock (Mirabilis) seeds from tna W rna and sow them in spring as described above. With one spring sowing of these Mirabilis jalapa seeds, a full-sun bed and a monthly high-potash feed, you can enjoy fragrant evening blooms all season and a plant that returns each year.
Jun 11, 2026 by Anas Heaba
Jun 11, 2026 by Anas Heaba
